package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.*;
import com.sky.websocket.WebSocketServer;
import io.swagger.util.Json;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.lang.module.Configuration;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private OrderService orderService;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        //1、处理各种业务异常（地址簿为空、购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //拼接用户下单地址
        String address = addressBook.getProvinceName() + " "
                + addressBook.getCityName()  + " "
                +  addressBook.getDistrictName() +
                " " + addressBook.getDetail();


        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if(shoppingCartList == null && shoppingCartList.size() ==0){
            //抛出业务异常
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2、向订单表中插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));

        orders.setAddress(address);

        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<>();
        //3、向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetailList);

        //4、清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //5、封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }


    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID;//支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;//订单状态，待接单

        //发现没有将支付时间check_out属性赋值，所有在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();

        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("调用updateStatus，用于替换微信支付更新数据库状态问题");
        orderMapper.updateStatus(OrderStatus,OrderPaidStatus,check_out_time,orderNumber);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Orders orders = orderMapper.getByNumber(orderNumber);
        Map map = new HashMap<>();
        map.put("type",1);//1表示来单提醒 2表示顾客催单
        map.put("orderId",orders.getId());
        map.put("content","订单号" + orderNumber);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        log.info("向管理端推送{}订单消息",orders.getId());

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

    }

    /**
     * 历史订单查询
     * @return
     */
    @Override
    public PageResult historyOrders(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());

        //查询订单
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        //封装订单中的订单明细
        if (page != null && page.size() >0){
            for (Orders orders : page){
                Long orderId = orders.getId();

                //根据订单id查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();

                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);

    }

    /**
     * 查询订单详细
     * @param id
     * @return
     */
    @Override
    public OrderVO orderDetail(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetail = orderDetailMapper.getByOrderId(id);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetail);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void userCancelById(Long id) {

        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在
        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        if (ordersDB.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //订单处于待接单状态需退款
        if(ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){

            //设置支付状态为退款
            orderMapper.setPayStatus(orders.getId(),Orders.REFUND);
        }

        //修改订单状态,取消原因，取消时间
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason("用户取消订单");
        orders.setStatus(Orders.CANCELLED);
        orderMapper.update(orders);

    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void userRetitionById(Long id) {

        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //查询订单中订单明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将订单明细对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            BeanUtils.copyProperties(x, shoppingCart,"id"); //第三个参数指忽略复制id属性
            shoppingCart.setUserId(BaseContext.getCurrentId());
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车数据插入用户用户车中

        for (ShoppingCart shoppingCart : shoppingCartList){
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 订单条件搜索
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {

        List<Orders> ordersList = page.getResult();

        List<OrderVO> list = new ArrayList<>();
        //将查询的orders对象封装到orderVO对象中
        for (Orders orders : ordersList){
            OrderVO orderVO = new OrderVO();

            BeanUtils.copyProperties(orders,orderVO);
            String orderDishes = getOrderDishesStr(orders);
            orderVO.setOrderDishes(orderDishes);
            list.add(orderVO);
        }

        return list;
    }

    //获取订单中的菜品字符串
    private String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        List<String> orderDishList = orderDetailList.stream().map( x ->{
            String orderDish = x.getName() + "*" + x.getName() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        return String.join(" ", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     */
    @Override
    public OrderStatisticsVO statistics() {

        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(confirmed);
        orderStatisticsVO.setConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /**
     * 商家接单
     */
    @Override
    public void confirm(Orders orders) {
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 商家拒单
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {

        //查询订单信息
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());


        //只用订单处于待接单状态下才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //拒单时，若订单已支付需退款
        if (ordersDB.getPayStatus().equals(Orders.PAID)){
            orderMapper.setPayStatus(ordersDB.getId(),Orders.REFUND);
        }

        //更新订单状态，拒单原因，取消时间
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersRejectionDTO,orders);
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelTime(LocalDateTime.now());

        //修改订单状态
        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //若订单已支付需退款
        if (ordersDB.getPayStatus().equals(Orders.PAID)){
            orderMapper.setPayStatus(ordersDB.getId(),Orders.REFUND);
        }

        //更新订单状态，取消原因，取消时间
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersCancelDTO,orders);
        orders.setCancelTime(LocalDateTime.now());
        orders.setStatus(Orders.CANCELLED);

        orderMapper.update(orders);

    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS).build();

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED).build();

        orderMapper.update(orders);
    }

    /**
     * reminder
     * @param id
     */
    @Override
    public void reminder(Long id) {

        Orders ordersDB = orderMapper.getById(id);

        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap<>();
        map.put("type",2);//1表示来单提醒 2表示客户催单
        map.put("orderId",id);
        map.put("content","订单号" + ordersDB.getNumber());


        webSocketServer.sendToAllClient(JSON.toJSONString(map));

    }


}
